package com.lingyl.gulimall.product.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.lingyl.common.constant.ProductConstant;
import com.lingyl.common.utils.PageUtils;
import com.lingyl.common.utils.Query;
import com.lingyl.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.lingyl.gulimall.product.dao.AttrDao;
import com.lingyl.gulimall.product.dao.AttrGroupDao;
import com.lingyl.gulimall.product.dao.CategoryDao;
import com.lingyl.gulimall.product.entity.AttrAttrgroupRelationEntity;
import com.lingyl.gulimall.product.entity.AttrEntity;
import com.lingyl.gulimall.product.entity.AttrGroupEntity;
import com.lingyl.gulimall.product.entity.CategoryEntity;
import com.lingyl.gulimall.product.service.AttrService;
import com.lingyl.gulimall.product.service.CategoryService;
import com.lingyl.gulimall.product.vo.AttrRespVo;
import com.lingyl.gulimall.product.vo.AttrVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {
    @Resource
    private AttrAttrgroupRelationDao attrAttrgroupRelationDao;
    @Resource
    private AttrGroupDao attrGroupDao;
    @Resource
    private CategoryDao categoryDao;
    @Autowired
    private CategoryService categoryService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public void saveAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr,attrEntity);
        //保存基本数据
        this.save(attrEntity);
        //保存关联关系
        if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() && attr.getAttrGroupId() != null) {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attrEntity.getAttrId());
            attrAttrgroupRelationDao.insert(relationEntity);
        }
    }

    @Override
    public PageUtils queryBaseAtrrPage(Map<String, Object> params, Long catelogId, String type) {
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("attr_type","base".equalsIgnoreCase(type)?1:0);
        if (catelogId != 0){
            queryWrapper.eq("catelog_id",catelogId);
        }
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)){
            queryWrapper.and((wrapper)->{
                wrapper.eq("attr_id",key).or().like("attr_name",key);
            });
        }
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                queryWrapper
        );

        PageUtils pageUtils = new PageUtils(page);
        List<AttrEntity> records = page.getRecords();
        List<AttrRespVo> attrRespVos = records.stream().map(attrEntity -> {
            AttrRespVo attrRespVo = new AttrRespVo();
            BeanUtils.copyProperties(attrEntity, attrRespVo);
            //设置分类和分组的名字(销售属性没有分组信息)
            if ("base".equalsIgnoreCase(type)){
                AttrAttrgroupRelationEntity attrId = attrAttrgroupRelationDao.selectOne(
                        new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId())
                );
                if (attrId != null && attrId.getAttrGroupId() != null) {
                    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrId.getAttrGroupId());
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }


            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
            if (categoryEntity != null) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }
            return attrRespVo;

        }).collect(Collectors.toList());

        pageUtils.setList(attrRespVos);
        return pageUtils;
    }

    @Override
    public AttrRespVo getAttrInfo(Long attrId) {
        AttrRespVo attrRespVo = new AttrRespVo();
        AttrEntity attrEntity = this.getById(attrId);
        BeanUtils.copyProperties(attrEntity,attrRespVo);

        // 设置分组信息(基本信息)
        if (attrEntity.getValueType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
            AttrAttrgroupRelationEntity attrAttrgroupRelationEntity = attrAttrgroupRelationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
            if (attrAttrgroupRelationEntity != null) {
                attrRespVo.setAttrGroupId(attrAttrgroupRelationEntity.getAttrGroupId());
                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrAttrgroupRelationEntity.getAttrGroupId());
                if (attrGroupEntity != null) {
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
        }

        //设置分类信息
        Long catelogId = attrEntity.getCatelogId();
        Long[] catelogPath = categoryService.findCatelogPath(catelogId);
        attrRespVo.setCatelogPath(catelogPath);
        CategoryEntity categoryEntity = categoryDao.selectById(catelogId);
        if (categoryEntity != null){
            attrRespVo.setCatelogName(categoryEntity.getName());
        }

        return attrRespVo;
    }

    /**
     * 更新attr
     * @param attr attr
     */
    @Transactional(rollbackFor = Exception.class)
    @Override
    public void updateAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr,attrEntity);
        this.updateById(attrEntity);

        // 修改分组关联
        if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attr.getAttrId());

            Integer count = attrAttrgroupRelationDao.selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
            // 如果原来有分组，则修改，如果原来没有则添加
            if (count > 0){
                attrAttrgroupRelationDao.update(relationEntity,new UpdateWrapper<AttrAttrgroupRelationEntity>().eq("attr_id",attr.getAttrId()));
            }else {
                attrAttrgroupRelationDao.insert(relationEntity);
            }
        }
    }

    /**
     * 根据分组id查找关联的所有基本属性
     * @param attrGroupId attr组id
     * @return {@link List<AttrEntity>}
     */
    @Override
    public List<AttrEntity> getRelationAttr(Long attrGroupId) {
        List<AttrAttrgroupRelationEntity> relationEntities = attrAttrgroupRelationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_group_id", attrGroupId));
        List<Long> attrIds = relationEntities.stream().map((attr) -> {
            return attr.getAttrId();
        }).collect(Collectors.toList());
        if (attrIds == null || attrIds.size() < 1){
            return null;
        }
        List<AttrEntity> attrEntities = this.listByIds(attrIds);
        return attrEntities;
    }

    /**
     * 获取当前分组没有关联的属性
     * @param params      参数个数
     * @param attrGroupId attr组id
     * @return {@link PageUtils}
     */
    @Override
    public PageUtils getNoRelationAttr(Map<String, Object> params, Long attrGroupId) {
        //1. 当前分组只能关联自己所属分类里面的所有属性
        AttrGroupEntity groupEntity = attrGroupDao.selectById(attrGroupId);
        Long catelogId = groupEntity.getCatelogId();
        //2. 当前分组只能关联别的分组没有引用的属性
        //2.1 当前分类下的其他分组
        List<AttrGroupEntity> groupEntities = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>().eq("catelog_id", catelogId));
        //2.2 其它分组关联的属性
        List<Long> otherAttrGroupIds = groupEntities.stream().map(item -> {
            return item.getAttrGroupId();
        }).collect(Collectors.toList());

        List<AttrAttrgroupRelationEntity> otherRelationEntities = attrAttrgroupRelationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", otherAttrGroupIds));
        List<Long> otherAttrIds = otherRelationEntities.stream().map(item -> {
            return item.getAttrId();
        }).collect(Collectors.toList());

        //2.3 从当前分类的所有属性中移除这些属性
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>().eq("catelog_id", catelogId).eq("attr_type",ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());
        if (otherAttrIds !=null && otherAttrIds.size() > 0){
            queryWrapper.notIn("attr_id", otherAttrIds);
        }

        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)){
            queryWrapper.and(wrapper -> {
                wrapper.eq("attr_id",key).or().like("attr_name",key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), queryWrapper);

        return new PageUtils(page);
    }

}